diff --git a/tests/ui/sized/recursive-type-coercion-from-never.rs b/tests/ui/sized/recursive-type-coercion-from-never.rs new file mode 100644 index 00000000000..a1b65463731 --- /dev/null +++ b/tests/ui/sized/recursive-type-coercion-from-never.rs @@ -0,0 +1,16 @@ +// build-fail +//~^ ERROR cycle detected when computing layout of `Foo<()>` + +// Regression test for a stack overflow: https://github.com/rust-lang/rust/issues/113197 + +trait A { type Assoc; } + +impl A for () { + type Assoc = Foo<()>; +} + +struct Foo(T::Assoc); + +fn main() { + Foo::<()>(todo!()); +} diff --git a/tests/ui/sized/recursive-type-coercion-from-never.stderr b/tests/ui/sized/recursive-type-coercion-from-never.stderr new file mode 100644 index 00000000000..7580e780dda --- /dev/null +++ b/tests/ui/sized/recursive-type-coercion-from-never.stderr @@ -0,0 +1,14 @@ +error[E0391]: cycle detected when computing layout of `Foo<()>` + | + = note: ...which requires computing layout of `<() as A>::Assoc`... + = note: ...which again requires computing layout of `Foo<()>`, completing the cycle +note: cycle used when elaborating drops for `main` + --> $DIR/recursive-type-coercion-from-never.rs:14:1 + | +LL | fn main() { + | ^^^^^^^^^ + = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information + +error: aborting due to 1 previous error + +For more information about this error, try `rustc --explain E0391`.